package main

import (
	"bufio"
	"fmt"
	"math"
	"os"
)

func main() {
	var x, y float64

	scanner := bufio.NewScanner(os.Stdin)
	scanner.Scan()

	for _, d := range scanner.Text() {
		switch d {
		case 'N':
			y++
		case 'E':
			x++
		case 'W':
			x--
		case 'S':
			y--
		}
	}

	fmt.Println(math.Hypot(math.Abs(x), math.Abs(y)))
}